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Gas Connections VII. Adjust Gas Input II. Connect-Chilled Water Lines V. Charge System with Water VIII. Balance System III. Electrical Connections VI. Check-Out and Operation Each of the above steps is discussed in detail in this instruction. Read the entire instruction before starting installation. Multiple Installations: When a multiple installation of this unit is planned, additional wiring and piping information is required. This is available through the local'Bryant distribu.to.r7 It is not recommended the Model 452 be inter-connected in multiples with other model chillers. This is undesirable because of difference in electrical characteristics, chiller water levels, pump head curve, etc. I. LOCATE AND MOUNT ABSORPTION UNIT The absorption unit is approved for outdoor installation only and may be located at ground level or on the roof. Consult local or other applicable codes for information concerning proximity to property lines, height above roof, obstructions, etc. A. Mounting Base 1. USE NON-COMBUSTIBLE MATERIALS. 2. Suggested types of mounting base for ground installation: a. Precast concrete lintels. Use three lintels the depth of unit, one each under right and left end of unit and one at center of unit. b. Concrete blocks. Use one block at each corner of unit plus blocks under the two long sides midway between the comer blocks. c. Concrete slab. Minimum thickness 4 inches. 3. For installation on a roof or other combustible material leave sufficient clearance between unit base and roof for proper air circulation. Use precast concrete lintels or concrete blocks as described in paragraph 2 above or steel beams. Check local -codes... Refer to NBFU code for Installation of Heat, Producing Appliances. B. Clearances 1. Absorption unit should have a minimum clearance of 2 feet on all sides from any adjacent obstruction. 2. Avoid locating the unit where hot condenser discharge air can impinge on nearby obstructions and mix with the inlet air supply. The condenser air discharges upward. The unit should be located outside of the plumb line FI Copy DO NOT REMOVE Figure 1 RATINGS AND CAPACITIES MODEL 90-452 Cooling Capacity BTUH 90,000 Heat Input BTUH 225,000 Gas Connection Size Inches 3/4 Condenser Air Delivery CFM 10,000 Water Flow (Nominal) GPM 18.5 Max. Friction Loss Handled by Chiller Pump Ft 37 Fan Motor - 208/230V 1 Phase HP 1/2(2) Chilled Water Pump Motor - 208/230V 1 Phase 60 cycle HP 1/3 Solution Pump Motor - 208/230V 1 Phase 60 cycle HP 1 Unit Full Load Current Draw Amps 17.7 Approximate Shipping Weight Lbs 1,300 90/452 -2 - Table I Nominal Pipe Size Inches Allowable Distance* Between Coil and Chiller Polyethylene Pipe Copper Pipe Galvanized Pipe SIZE 90 SIZE 90 SIZE 90 1 30' 51 ' 54' iy4 205' 165' 220 ' ll/i 490- j OO oo CO 492 ' * Note: Values shown in above table are for one direction only. The total length of pipe from chiller to coil and return would be double the above table values. The above table applies to single unit installations only. II. CONNECT CHILLED WATER LINES Chiller is designed for operation at atmospheric pressure only. A. Materials Refer to section on "Freezing Weather Protection at the end of this instruction. 1. Piping a. Polyethylene Plastic Pipe - use medium density flexible pipe whose wall thickness approximates Schedule 40 pipe (Commercial Standard CS 255 . Pipe must be virgin plastic . Do not use pipe manufactured from reclaimed plastic. b. Copper - satisfactory substitute. c. Galvanized - satisfactory substitute. 3. Lengths shown in Table I are based on using a total of eight galvanized wellhead elbows in the entire water line (chiller to coil and return). Lengths are predicated on the use of a Bryant matching water coil. For greater distances use larger pipe or add a pump. C. Insulation 1. Insulate supply and return lines separately. 2. Material should be of good quality and be covered with a good vapor barrier. Armaflex or equivalent is recommended. Wall thickness: 1/2 inch. 2. Fittings a. Galvanized - use when possible. b. Brass - satisfactory substitute. c. Nylon - satisfactory substitute. B. Pipe Length and Diameter Table I shows maximum length of pipe of different diameters that can be used between the pump discharge and the coil inlet and still maintain minimum allowable (design) water flow rate. 1. Multiply table values by two to obtain the total length of pipe from chiller to coil and return. 2. Length is measured alongthe pipe path and therefore includes vertical distance between the water coil and the chiller. D. Height of Coil above Absorption Unit Practical coil elevation is limited only by the atmospheric pressure supported hydraulic head. E. Water Coil Connections 1. If cooling coil is used in connection with heating unit, and the heating unit is not approved for installation downstream from cooling coil, install cooling coil in parallel with or downstream of heating unit. This wi...